Armature shaft winding cap



Feb. 22, 1949 J. M. ENGLAND ARMATUR E SHAFT WINDING CAP Filed May 4, 1945 INVENTOR.

JAMES A7. f/v LAN.

f fa/ aw Feb. 2, 1949 ARMATURE SHAFT WINDING car James M. England, Lebanon, Mo., assignorof onethird to David E. Owen both of Litchfleld, 111.

Application May 4, 1945, Serial No. 591,965

5 Claims. (01. 242-13) This invention relates to armature winding apparatus and more particularly to means for connecting the ends of conductor wires to the armature during winding of the coils into'the armature slots.

One of the objects of this invention is to provide improved means for permitting conductor wire ends to be quickly and efliciently attached to an armature during winding thereof.

Another object is to provide improved con.- ductor wire end attaching means for use during winding of an armature which will result in a saving of conductor wire and also insure that the wound conductor wires of a wound coil will be maintained in place during winding of succeeding coils and thus not interfere therewith.

A further object is to provide a conductor wire holding means for winding armatures which will permit the ends of two conductor wires tobe held for simultaneous winding a number of turns and permit the winding of one additional turn with one of the wires to thereby embody an odd number of turns in a coil.

A more specific object is to produce an easily mounted cap for the end of an-armature shaft which is so provided with conductor wire end receiving holes that said conductors will be easily secured and firmly held to the armature to facilitate rapid and eflicient winding of the armature.

Other objects of the invention will become apparent from the following description taken in connection with the accompanying drawing in which: k Figure 1 is a perspective view of a conductor holding cap embodying my invention, said cap being shown mounted on the end of an armature shaft with conductors attached thereto;

lar in form having .a smooth inner cylindrical surface and a smooth outer cylindrical surface.

4t one end of the cap there is drilled into its wall aplurality of axially extending holes equally spaced apart circumferentially, said holes extendinto the wall of the cap substantially oneand Edmond A. Gill,

2 third of its length. The particular cap illustrated is provided with twenty-four holes and is to be employed for use with winding an armature having twelve slots. Preferably the cap is provided with at least twice as many holes as the slots of the armature upon which it is to be used.

The illustrated cap of Figures 1 to 4 is to be used with an armature shaft 3 of the type having a reduced end portion 4, which reduced portion results in a shoulder 5 at the inner end of said reduced portion. The cap is substantially the same length as the reduced portion and the inner diameter of said cap is such that the cap can have a snug fit on the reduced portion 4, all as clearly illustrated in Figure '4. The armature 6 which is mounted upon the shaft 3 is provided with the usual slots I (one only being shown) into which the. conductors are wound to form coils asiswell known.

In forming the slot received coils two conductor wires W and R are employed which wires arefed from two supply reels. The insulation on these conductor wires is of different colors,. as for ex ample, the W wire having white insulation and the R wire haying red insulation or a red thread therein. In using the cap during winding of the armature 6 the cap is positioned on the reduced end of the shaft 3 in a manner indicated in Figures 1 and 4. The endportionsof the two conductors to be wound in the slots of the armature are next stuck into the two adjacent holes which are the closest to the particular slot 1 into which a the conductors are first received during winding,

illustrated in Figure 4. During winding the armature is placed in a suitable machine, if to be wound by a machine, and then the armature is rotated end over end and about an axis at right angles to the axis of the armature shaft so that the wires will be placed in the slot 1, another slot remote therefrom and then back through slot 1, etc.', as is well known. practice. The direction of movement of the end of the armature which carries the cap is indicated by the arrow in Figure 4. After the armature has been turned a desired number of turns to produce the number of conductor turns for each coil, the conductors will be cut and the ends thereof coming from the feed held ends interfering with the subsequent winding operations.

If in making each coil for a pair of armature slots the specification should call for an odd number of turns, then this can be quickly and readily accomplished when using the winding cap embodying my invention. Forexample, if a coil requires eleven turns for the size of wire being used the two conductors W and R can be given five simultaneous turns and then one of the conductor wires such as W cut. Following this cutting the armature is given one more turn and this will add a single turn by the uncut conductor wire R, thus making the eleven required turns. This simple arrangement for giving an odd number of turns to a coil is not possible in machines which employ a cap having prongs over which the wire folds, as under such conditions it is not possible to cut any wire before the entire armature is wound and all the coils placed in the required slots.

During winding there is no possibility of the cap becoming removed from the end of the armature shaft by sliding off as the wires connected into the holes will hold the'cap in place. With the particular cap construction the ends of the conductors will be securely held to the armature by the cap. After the ends of the wires are stuck into the holes it will be necessary for them to be given nearly a 380 degree bend to place them in the desired armature slot. This extreme angle of bend firmly hooks the ends of the wires into the cap and insofar as ordinary pulling forces are concerned it is impossible to detach the wires from the cap as the pulling force will be taken by the end of the cap between each hole and the outer cap surface. The diameter .of the holes 2 are slightly larger than the diameter of the wire employed, thus the wires can be easily received in the holes when the'wires are to be attached to the cap.

With the use of the cap it should be noted that there is considerable saving in wire as very little wire is used in making the attachment to the armature shaft, as is the case in prior conductor holding means as, for example, those using a handle attachable to the end ofthe armature shaft and provided with hooks positioned on the handle at a substantial axial distance from the end'of the armature shaft.

In Figure 5 there is shown a slightly different form of cap which is to be employed on armatures which do not have the reduced end portion 4 and shoulder 5 as the armature shaft illustrated in Figure 4. In this different form of construction the cap I has stepped bores 8 and 9 to provide a shoulder I0 adjacent the outer end of the cap having the holes 2. The. large bore 8 at the inner end receives the end portion of the armature shaft 3' and the extreme outer end of the armature shaft engages the shoulder III to prevent the cap from sliding inward beyond the desired point on the end portion of the shaft.

Being aware of the possibility of modifications in the particular caps shown and described without departing from the principles ofthe invention, I do not intend that the scope of said invention be limited in any manner except in accordance with the appended claims.

What is claimed is: v 1. A one piece cap for use in holding the ends of conductor wires during winding of a slotted armature and comprising a member constructed to have a bore of substantial length so as to be positioned on the end portion of 'an armature shaft and having circumferentially spaced holestherein for receiving the end portions of the conductor wire to be wound on the armature, each opening being so arranged in the member that when the member is on the shaft its wire receiving open end will be so directed in a direction away from the armature that with an end portion of a wire inserted in the opening, bent adjacent the open end of the opening and the wire positioned under tension in the first armature receiving slot therefor, the end portion which is received in the opening will be at an angle not greater than degrees with the portion of the wire extending to the first receiving slot.

2. A one piece cap for use in connecting the ends of conductor wires to a slotted armature shaft during winding of an armature, said cap comprising a member having an opening of substantial length for receiving the end portion of the armature shaft and being provided with circumferentially spaced holes therein, each of said holes being of a size to receive the end portion of a conductor wire and having its conductor receiving open end remote from the armature when the cap is positioned on the shaft and the axis of each hole so related to the axis of the cap that the portion of the conductor wire leading to an armature slot from the end portion received in the hole will be at an angle not greater than 90 degrees with said hole axis.

3. A one piece cap for use in connecting the ends of conductor wires to an armature during windingthereof, said cap comprising a member having a bore of substantial length for receiving the end portion of the armature shaft and provided in its end thereof which is to be remote from the armature with a plurality of circumferentially spaced holes parallel to the axis of the bore of the cap, each of which is of a size to freely receive the end portion of a conductor wire.

4. A one piece cap for use in connecting the ends of conductor wires to an armature during winding thereof, said cap comprising a tubular member having an inner cylindrical surface of substantial length for positioning it on an armature shaft and being provided in its wall with a plurality of circumferentially arranged wire receiving holes equally spaced apart with their axes parallel to the axis of the inner cylindrical surface and extending inwardly from .the end which is to be remote from the armature.

5. A one piece cap for use in connecting the ends of conductor wires to an armature during winding thereohsaid cap comprising a member having a stepped bore the larger of which is of substantial length and of a size for snugly receiving the end portion of the armature shaft and being provided in its end having the smaller bore with a plurality of circumferentially spaced internal holes, each of which extends parallel tothe axis of the shaft and is a size to receive the end portion of a conductor wire.

JAMES M. ENGLAND.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Date 

